Use the framing controller configuration command to select the frame type for the T1 or E1 data line.
framing {sf | esf} (for T1 lines)
framing {crc4 | no-crc4} [australia] (for E1 lines)
Syntax Description
sf Specifies Super Frame as the T1 frame type. esf Specifies Extended Super Frame as the T1 frame type. crc4 Specifies CRC4 frame as the E1 frame type. no-crc4 Specifies no CRC4 frame as the E1 frame type. australia (Optional) Specifies the E1 frame type used in Australia. Defaults
Super Frame is the Default on a T1 line.
CRC4 frame is the Default on an E1 line.
Command Mode
Controller configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0 as framing {sf | esf}.
Use this command in configurations where the router or access server is intended to communicate with T1 or E1 fractional data line. The service provider determines which framing type, either sf, esf, or crc4, is required for your T1/E1 circuit.
Example
The following example selects Extended Super Frame as the T1 frame type:
framing esf